Mold



Oct. 2, 1934. A. .1. MARTIN ET Al. 1,975,330

eeeeeeeeeeee t l cf- 2, 1934- A. J. MARTIN ET A1. 1,975,330

MOLD Filed Feb. l, 1932 2 sheets-sheet 2 Patented Oct. 2, 1934 MOLD - Andrew J.

Martin, CharlesEFleming, and John L, Havins, Houston, Tex. I

Application February 1, 1932, Serial No. 590,189

`1 claim. (ci. 25-121) This invention relates to a mold. An object of the invention is to provide a form, for mold, whereby a special type of building units may lbe molded from plastic material.`

AAnother object is to provide a novel type of mold lboi; having a special type of partition therein for separating the matrices of said box and shaped to give the desired contour to the top and bottom of the units tothe end that the bottom oi one molded unit will form an exact and perfect t with the top of the unit beneath.

Another object of the invention is to provide a mold box separated into matrices whose ends are shaped to give the desired form to the ends of the molded units whereby the ends of said units will interit when the units are laid end to end and will be provided with a drain passageway at the joint between the ends of the adjacent units.

Another object is to provide, in a mold, a special arrangement of the mandrel about which the unit is formed.

With the above and other objects in view, the invention has particular relation to certain novel features of construction, arrangement of parts and use an example of which is given in this specincation and illustrated in the accompanying drawings, wherein:-

Figure 1 shows a fragmentary perspective View of the mold, partly in section.

Figure 2 shows a cross sectional view thereof.

Figure 3 shows a fragmentary longitudinal sectional view taken on the line 3-3 of Figure 2.

Figure i shows an enlarged, fragmentary sectional view taken on the line 4-4 of Figure 2, and

Figure 5 shows a perspective View of the molded unit produced by said mold.

Referring now more particularly tothe drawings, wherein like numerals of reference designate similar parts in each of the figures, the numerals 1, 1 designate the side walls of the mold which are spaced apart a suiiicient distance to give the molded units the desired length. These sides have the inside lengthwise ribs 2, 2 arranged approximately midway between the upper and lower margins of said sides 1. Above and beneath the ribs 2 of one side are the inside, lengthwise tenons 3, 4, and aligned with these tenons 3, 4, the other side 1 has the inside upper and lower longitudinal mortises 5, 6, of slightly smaller cross sectional dimensions than those of the corresponding tenons 3, 4.

The mold may be located on any suitable platform, as 7, which forms a bottom for the mold.

The mold is separated into matrices 8, of the required dimensions by suitable transverse partitions 9, 10, alternately arranged. The partitions 9 are formed of the plates 11, 11 whose upper and lower portions 12, 12 are correspondingly overturned and have their upper and lower margins 13, 13 turned outwardly into parallel relation with 60 the main body of the plates and these outwardly turned margins are fitted together, as shown, to form the partitions 9. The partitions 19 are formed of plates, similar to the plates 11 but are reversely arranged, that is their body portions are iitted together and their outwardly turned inargins are spaced apart.

The partitions have the aligned openings 14. and one plate of each partition has an end of a tubular core, or mandrel, 15 ancho-red thereto around the opening of said plate and this mandrel extends across the adjacent matrix 8 and is tapered toward and terminates at, and surrounds, the opening 14 of the partition on the other side of said matrix. These mandrels are preferably rectangular in cross sectional contour and may be made of sheet metal or other suitable material.

The ends of the partitions 9, 10 are preferably mortised into the inner sides of the walls of the 0 m-old and said walls may be secured together in any preferred manner.

When the mold is assembled as shown the plastic material may be poured into the matrices 8 and when the matrices are lled the top may 95 be smoothed oif and the material allowed to set around the mandrels. The upper sides of the units will be formed by the partitions l0 and their under sides will be formed by the partitions 9. It will be noted that the lengthwise tapering elevation 16, of the unit, will be molded between the overturned portions 12 of the partitions 10 and the marginal lengthwise ribs 17, 17 or the underside of the units will be molded on the outer sides of the overturned portions 12 of the partitions 9 to the end that the space between the ribs 17 will be flared and will have a transverse diameter slightly greater than that of the elevation 16 so that said space on the underside of each unit will readily receive the elevation on thev top of the unit underneath, as the units are erected into a structure.

The ends of each unit will have the lvertical grooves 18, formed by the ribs 2 and each unit will have the vertical outwardly tapered, mortises 19, 19 at one end, formed by the tenons 3, 4 and the vertical outwardly tapered tenons 20, 2 0 at the other end, formed by the mortises 5, 6.

When the blocks have set, in the mold, the side walls 1, l, may be removed, and the taper- 1.0

ing mandrels and attached partition plates withdrawn and the blocks removed, in succession from one end of the mold to the other.

The units will be erected in courses with the tenons at one end of a unit projecting into the mortises of the adjacent unit and with the grooves 18 at adjacent ends of said units registering to form drain passageways. The tiers of blocks, or units, will be arranged with respect t0 adjacent tiers so that the joints will be broken and the drain passageways of alternate tiers will align and will be also aligned with the openings through the blocks between.

Any moisture that may nd its way from the outside of the wall in through the joints will not be liable to pass by the outer tenon and mortisev of the joints, but in case it does and thus reaches the drain passageways it will drain down through the wall and cannot reach the inner side thereof.

The drawings and description disclose what is now considered to be a preferred :form of the invention by way of illustration only, while the broad principle of the invention will be deiined by the appended claim.

What we claim is:

A mold of the Character described comprising side walls spaced apart, each having an inside lengthwise rib arranged approximately midway between the upper and lower margins of said sides, a bottom on which said sides are mounted,

the openings through said partitions being aligned, said plates having lengthwise portions on the opposite sides of said central openings which are 'similarly offset from end to end of the body the vmargins of said offset portions being turned outwardly in a common plane which is parallel with the plane of the body, said side walls having vertical inside mortises to receive the ends of said partitions and said ribs forming braces for the partitions, a tubular core or mandrel having one 'end surrounding and extended through the opening of and being secured to one plate of each partition, said mandrel extending across the adjacent matrix and being tapered toward and terminating in a free end adjacent and surrounding the opening of the partition at the other side of said matrix whereby an unobstructed flue is provided for the free passage of air throughout the mold from end to end thereof, said free end being unattached to, and unsupported by, said last mentioned partition.

vANDREW J. MARTIN.

CHARLES F. FLEMING. JOHN L. HAVINS. 

